system 'awk "{if ((substr(\$1,1,1)==\"0\") && (\$11 < 200) && (\$11 > 0)) print \$0}" dfm.log > dfm-numbers.log'

set xdata time                                                          
set timefmt "%y-%m-%d %H:%M:%S"                                         

set xrange ["09-05-13 16:00:00":*]

dropfirst(x) = (x > 0 ? x : 1/0)

plot \
  'dfm-numbers.log'  u 1:($11<200 ? dropfirst($3) : 1/0) every 1 w l t "1A", \
  ''  u 1:($11<200 ? dropfirst($4) : 1/0) every 1 w l t "1B", \
  ''  u 1:($11<200 ? dropfirst($5) : 1/0) every 1 w l t "2A", \
  ''  u 1:($11<200 ? dropfirst($6) : 1/0) every 1 w l t "2B", \
  ''  u 1:($11<200 ? dropfirst($7) : 1/0) every 1 w l t "3A", \
  ''  u 1:($11<200 ? dropfirst($8) : 1/0) every 1 w l t "3B", \
  ''  u 1:($11<200 ? dropfirst($10) : 1/0) every 1 w l t "2A, old sensor"

#  ''  u 1:($11<200 ? dropfirst($11) : 1/0) every 1 w l t "total"

#  ''  u 1:($11<200 ? dropfirst($9) : 1/0) every 1 w l t "power A", \
